Muscular System Overview

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Across
  1. 2. _______ muscle have broad origin points and narrow insertion sites with fascicles that spread like a fan
  2. 5. the site where a motor neuron's terminal meets the muscle fiber; this synapse is called the _______ junction (NMJ)
  3. 7. _______ muscle fibers are multinucleated structures that compose the skeletal muscle.
  4. 8. _______ which results in the increased mass and bulk in a skeletal muscle
  5. 11. _______ that happens when cells recoil to resting position when signal ceases.
  6. 12. _______ where the number of sarcomeres and myofibrils disappear (but not the number of muscle fibers).
Down
  1. 1. _______ muscles are the typical muscle shape characterized by a thick middle and tapered ends
  2. 3. _______ that occurs when muscle cells stretch so that they are up to 3X longer than they are at rest.
  3. 4. _______ muscles act as sphincters by ringing around body openings and closing them during contraction
  4. 6. _______ muscle fibers each have one to two nuclei and are physically and electrically connected to each other so that the entire heart contracts as one unit (called a syncytium).
  5. 9. _______ muscles have many feather-like fascicles that insert obliquely on a tendon
  6. 10. _______ muscle fiber (which has only a single nucleus) has a uniform, nonstriated appearance (resulting in the name smooth muscle)